Camera optical lens

ABSTRACT

The present disclosure discloses a camera optical lens including: a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a positive power; a fourth lens having a negative refractive power, a fifth lens having a positive power; a sixth lens having a negative refractive power; wherein the camera optical lens satisfies conditions: −10.00≤f6/f5≤−2.50; 3.00≤d8/d10≤10.00; where f5 and f6 respectively denotes a focal length of the fifth lens and the sixth lens, d8 denotes an on-axis distance from the image-side surface of the fourth lens to the object-side surface of the fifth lens, d10 denotes an on-axis distance from the image-side surface of the fifth lens to the object-side surface of the sixth lens. The camera optical lens in the present disclosure satisfies a design requirement of large aperture, long focal length and ultra-thinness while having good optical performance.

TECHNICAL FIELD

The present disclosure relates to the field of optical lens, in particular, to a camera optical lens suitable for handheld devices, such as smart phones and digital cameras, and imaging devices, such as monitors or PC lenses.

BACKGROUND

Recently, as smart phones spring up, requirement of thinner and smaller camera lens is rising day by day. A general camera lens usual employs charge-coupled device (CCD) or complementary metal-oxide semiconductor sensor (CMOS sensor) as photosensitive device thereof. Due to the improvement of semiconductor manufacturing technology, the pixel size of the photosensitive device is reduced. In addition to current development trend of electronic products going towards better functions and thinner and smaller dimensions, miniature camera lenses with good imaging quality is becoming a mainstream in the market.

In order to obtain better imaging quality, a lens that is traditionally equipped in a mobile phone camera adopts a three-piece or four-piece lens structure. However, with the development of technology and the diversification of user demand, the pixel area of the photosensitive device is decreasing and the imaging quality of the system is increasing. Accordingly, six-piece lens structure gradually appears in the lens design. Although a lens as such has good optical performance, the lens is fairly unreasonable in terms of setting of optical power, lens shape and distance between lenses, rendering that the lens structure with good optical performance cannot satisfy a design requirement of large aperture, long focal length and ultra-thinness.

SUMMARY

To address the above issues, the present disclosure seeks to provide a camera optical lens that satisfies a design requirement of large aperture, long focal length and ultra-thinness while having good optical performance.

The technical solutions of the present disclosure are as follows:

A camera optical lens with six lenses including, from an object side to an image side: a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a positive power; a fourth lens having a negative refractive power, a fifth lens having a positive power; and a sixth lens having a negative refractive power; wherein the camera optical lens satisfies following conditions:

−10.00≤f6/f5≤−2.50; and

3.00≤d8/d10≤10.00;

where f5 denotes a focal length of the fifth lens; f6 denotes a focal length of the sixth lens; d8 denotes an on-axis distance from the image-side surface of the fourth lens to the object-side surface of the fifth lens; and d10 denotes an on-axis distance from the image-side surface of the fifth lens to the object-side surface of the sixth lens.

As an improvement, the camera optical lens further satisfies the following condition:

2.00≤(R7+R8)/(R7−R8)≤15.00;

where R7 denotes a central curvature radius of an object-side surface of the fourth lens; and R8 denotes a central curvature radius of an image-side surface of the fourth lens.

As an improvement, the camera optical lens further satisfies the following condition:

5.00≤f4/f≤−1.50;

where f denotes a focal length of the camera optical lens; and f4 denotes a focal length of the fourth lens.

As an improvement, the camera optical lens further satisfies the following condition:

0.21≤f1/f≤0.65;

−1.05≤(R1+R2)/(R1−R2)≤−0.34; and

0.07≤d1/TTL≤0.22;

where f denotes a focal length of the camera optical lens; f1 denotes a focal length of the first lens; R1 denotes a central curvature radius of an object-side surface of the first lens; R2 denotes a central curvature radius of an image-side surface of the first lens; d1 denotes an on-axis thickness of the first lens; and TTL denotes a total optical length of the camera optical lens.

As an improvement, the camera optical lens further satisfies the following conditions:

−1.04≤f2/f≤−0.34;

1.35≤(R3+R4)/(R3−R4)≤4.22; and

0.02≤d3/TTL≤0.07;

where f denotes a focal length of the camera optical lens; f2 denotes a focal length of the second lens; R3 denotes a central curvature radius of an object-side surface of the second lens; R4 denotes a central curvature radius of an image-side surface of the second lens; d3 denotes an on-axis thickness of the second lens; and TTL denotes a total optical length of the camera optical lens.

As an improvement, the camera optical lens further satisfies the following conditions:

1.59≤f3/f≤13.08;

−0.23≤(R5+R6)/(R5−R6)≤1.17; and

0.03≤d5/TTL≤0.09;

where f denotes a focal length of the camera optical lens; f3 denotes a focal length of the third lens; R5 denotes a central curvature radius of an object-side surface of the third lens; R6 denotes a central curvature radius of an image-side surface of the third lens; d5 denotes an on-axis thickness of the third lens; and TTL denotes a total optical length of the camera optical lens.

As an improvement, the camera optical lens further satisfies the following conditions:

0.01≤d7/TTL≤0.10;

where d7 denotes an on-axis thickness of the fourth lens; and TTL denotes a total optical length of the camera optical lens.

As an improvement, the camera optical lens further satisfies the following conditions:

0.53≤f5/f≤1.85;

0.63≤(R9+R10)/(R9−R10)≤2.70; and

0.05≤d9/TTL≤0.16;

where f denotes a focal length of the camera optical lens; R9 denotes a central curvature radius of an object-side surface of the fifth lens; R10 denotes a central curvature radius of an image-side surface of the fifth lens; d9 denotes an on-axis thickness of the fifth lens; and TTL denotes a total optical length of the camera optical lens.

As an improvement, the camera optical lens further satisfies the following conditions:

−23.56≤f6/f≤−1.78;

−22.86≤(R11+R12)/(R11−R12)≤−3.95; and

0.05≤d11/TTL≤0.16;

where f denotes a focal length of the camera optical lens; R11 denotes a central curvature radius of an object-side surface of the sixth lens; R12 denotes a central curvature radius of an image-side surface of the sixth lens; d11 denotes an on-axis thickness of the sixth lens; and TTL denotes a total optical length of the camera optical lens.

As an improvement, the camera optical lens further satisfies the following condition:

TTL/IH≤2.35;

where TTL denotes a total optical length of the camera optical lens; and IH denotes an image height of the camera optical lens.

The present disclosure is advantageous in: the camera optical lens in the present disclosure has good optical performance and has characteristics of large aperture, long focal length and ultra-thinness, and is especially fit for WEB camera lenses and mobile phone camera lens assemblies composed by such camera elements as CCD and CMOS for high pixels.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic diagram of a structure of a camera optical lens according to Embodiment 1 of the present disclosure.

FIG. 2 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 1.

FIG. 3 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 1.

FIG. 4 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 1.

FIG. 5 is a schematic diagram of a structure of a camera optical lens according to Embodiment 2 of the present disclosure.

FIG. 6 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 5.

FIG. 7 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 5.

FIG. 8 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 5.

FIG. 9 is a schematic diagram of a structure of a camera optical lens according to Embodiment 3 of the present disclosure.

FIG. 10 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 9.

FIG. 11 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 9.

FIG. 12 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 9.

DETAILED DESCRIPTION OF EMBODIMENTS

To make the objects, technical solutions, and advantages of the present disclosure clearer, embodiments of the present disclosure are described in detail with reference to accompanying drawings in the following. A person of ordinary skill in the art can understand that, in the embodiments of the present disclosure, many technical details are provided to make readers better understand the present disclosure. However, even without these technical details and any changes and modifications based on the following embodiments, technical solutions required to be protected by the present disclosure can be implemented.

Embodiment 1

Referring to the drawings, the present disclosure provides a camera optical lens 10. FIG. 1 shows the camera optical lens 10 of Embodiment 1 of the present disclosure, the camera optical lens 10 includes six lenses. Specifically, the camera optical lens 10 includes, from an object side to an image side: an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6. An optical filter GF can be further included and arranged between the sixth lens L6 and the image surface Si.

In this embodiment, the first lens L1 has a positive refractive power, the second lens L2 has a negative refractive power, the third lens L3 has a positive refractive power, the fourth lens L4 has a negative refractive power, the fifth lens L5 has a positive refractive power, and the sixth lens L6 has a negative refractive power.

In this embodiment, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 are made of plastic. In other embodiments, each lens can be made of other materials.

In this embodiment, a focal length of the fifth lens L5 is defined as f5, a focal length of the sixth lens L6 is defined as f6, and the camera optical lens 10 further satisfies the following condition: −10.00≤f6/f5≤−2.50. This condition specifies a ratio between the focal length f6 of the sixth lens L6 and the focal length f5 of the fifth lens L5, which facilitates improving imaging quality.

An on-axis distance from the image-side surface of the fourth lens L4 to the object-side surface of the fifth lens L5 is defined as d8, an on-axis distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6 is defined as d10, and the camera optical lens 10 further satisfies the following condition: 3.00≤d8/d10≤10.00. This condition specifies a ratio between the on-axis distance d8 from the image-side surface of the fourth lens L4 to the object-side surface of the fifth lens L5, and the on-axis distance d10 from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6. In case of a ration of d8 and d10 satisfying this condition, the place of the fifth lens L5 is effectively distributed, thereby facilitating lens assembling. Preferably, the camera optical lens 10 further satisfies the following condition: 3.01≤d8/d10≤9.97.

A central curvature radius of an object-side surface of the fourth lens L4 is defined as R7, a central curvature radius of an image-side surface of the fourth lens L4 is defined as R8, and the camera optical lens 10 further satisfies the following condition: 2.00≤(R7+R8)/(R7−R8)≤15.00. This condition specifies a shape of the fourth lens L4, which effectively correct field curvature and improving imaging quality.

A focal length of the camera optical lens 10 is defined as f, a focal length of the fourth lens L4 is defined as f4, and the camera optical lens 10 further satisfies the following condition: 5.00≤f4/f≤−1.50. This condition specifies a ratio between the focal length f4 of the fourth lens L4 and the focal length f of the camera optical lens 10, which facilitates correcting aberration and improving imaging quality.

In this embodiment, the first lens L1 includes an object-side surface being convex in a paraxial region and an image-side surface being convex in the paraxial region.

A focal length of the camera optical lens 10 is defined as f, a focal length of the first lens L1 is defined as f1, and the camera optical lens 10 further satisfies the following condition: 0.21≤f1/f≤0.65. This condition specifies the positive refractive power of the first lens L1 properly, which facilitates realizing ultra-thinness and decreasing the aberration of the optical system. Preferably, the camera optical lens 10 further satisfies the following condition: 0.34≤f1/f≤0.52.

A central curvature radius of an object-side surface of the first lens L1 is defined as R1, a central curvature radius of an image-side surface of the first lens L1 is defined as R2, and the camera optical lens 10 further satisfies the following condition: −1.05≤(R1+R2)/(R1−R2)≤−0.34. This condition specifies a shape of the first lens L1 reasonably, thereby effectively correcting spherical aberration of the camera optical lens 10. Preferably, the camera optical lens 10 further satisfies the following condition: −0.65≤(R1+R2)/(R1−R2)≤−0.43.

An on-axis thickness of the first lens L1 is defined as d1, a total optical length of the camera optical lens 10 is defined as TTL, and the camera optical lens 10 further satisfies the following condition: 0.07≤d1/TTL≤0.22, within a range of which it facilitates realizing ultra-thinness. Preferably, the camera optical lens 10 further satisfies the following condition: 0.11≤d1/TTL≤0.17.

In this embodiment, the second lens L2 includes an object-side surface being convex in a paraxial region and an image-side surface being concave in the paraxial region.

A focal length of the camera optical lens 10 is defined as f, a focal length of the second lens L2 is defined as f2, and the camera optical lens 10 further satisfies the following condition: −1.04≤f2/f≤−0.34. This condition specifies the negative refractive power of the second lens L2 in a reasonable range, which facilitates correcting the aberration of the optical system. Preferably, the camera optical lens 10 further satisfies the following condition: −0.65≤f2/f≤−0.42.

A central curvature radius of an object-side surface of the second lens L2 is defined as R3, a central curvature radius of an image-side surface of the second lens L2 is defined as R4, and the camera optical lens 10 further satisfies the following condition: 1.35≤(R3+R4)/(R3−R4)≤4.22. Within this condition, which specifies a shape of the second lens L2, it facilitates correcting the on-axis aberration along with the development of the lenses towards ultra-thinness. Preferably, the camera optical lens 10 satisfies the following condition: 2.16≤(R3+R4)/(R3−R4)≤3.38.

An on-axis thickness of the second lens L2 is defined as d3, a total optical length of the camera optical lens 10 is defined as TTL, and the camera optical lens 10 further satisfies the following condition: 0.02≤d3/TTL≤0.07. Within this condition, ultra-thinness can be realized. Preferably, the camera optical lens 10 satisfies the following condition: 0.04≤d3/TTL≤0.05.

In this embodiment, the third lens L3 includes an object-side surface being convex in a paraxial region and an image-side surface being convex in the paraxial region.

A focal length of the camera optical lens 10 is defined as f, a focal length of the third lens L3 is defined as f3, and the camera optical lens 10 further satisfies the following condition: 1.59≤f3/f≤13.08. With a reasonable distribution of the refractive power, the system has better imaging quality and lower sensitivity. Preferably, the camera optical lens 10 satisfies the following condition: 2.55≤f3/f≤10.46.

A central curvature radius of an object-side surface of the third lens L3 is defined as R5, a central curvature radius of an image-side surface of the third lens L3 is defined as R6, and the camera optical lens 10 further satisfies the following condition: −0.23≤(R5+R6)/(R5−R6)≤1.17. This condition specifies a shape of the third lens L3, within a range of which it helps alleviate a deflection degree of the light passing through the lens, and effectively reduce an aberration. Preferably, the camera optical lens 10 satisfies the following condition: −0.14≤(R5+R6)/(R5−R6)≤0.94.

An on-axis thickness of the third lens L3 is defined as d5, a total optical length of the camera optical lens 10 is defined as TTL, and the camera optical lens 10 further satisfies the following condition: 0.03≤d5/TTL≤0.09, within a range of which it facilitates realizing ultra-thinness. Preferably, the camera optical lens 10 satisfies the following condition: 0.05≤d5/TTL≤0.07.

In this embodiment, the fourth lens L4 includes an object-side surface being convex in a paraxial region and an image-side surface being concave in the paraxial region.

An on-axis thickness of the fourth lens L4 is defined as d7, a total optical length of the camera optical lens 10 is defined as TTL, and the camera optical lens 10 further satisfies the following condition: 0.01≤d7/TTL≤0.10, within a range of which it facilitates realizing ultra-thinness. Preferably, the camera optical lens 10 satisfies the following condition: 0.02≤d7/TTL≤0.08.

In this embodiment, the fifth lens L5 includes an object-side surface being concave in a paraxial region and an image-side surface being convex in the paraxial region.

A focal length of the camera optical lens 10 is defined as f, a focal length of the fifth lens L5 is defined as f5, and the camera optical lens 10 further satisfies the following condition: 0.53≤f5/f≤1.85, which specifies the fifth lens L5 so as to make a light angle of the camera optical lens 10 to be gentle and reduce tolerance sensitivity. Preferably, the camera optical lens 10 satisfies the following condition: 0.86≤f5/f≤1.48.

A central curvature radius of an object-side surface of the fifth lens L5 is defined as R9, a central curvature radius of an image-side surface of the fifth lens L5 is defined as R10, and the camera optical lens 10 further satisfies the following condition: 0.63≤(R9+R10)/(R9−R10)≤2.70. Within this condition, which specifies a shape of the fifth lens L5, it facilitates correcting the off-axis aberration along with the development of the lenses towards ultra-thinness. Preferably, the camera optical lens 10 satisfies the following condition: 1.01≤(R9+R10)/(R9−R10)≤2.16.

An on-axis thickness of the fifth lens L5 is defined as d9, a total optical length of the camera optical lens 10 is defined as TTL, and the camera optical lens 10 further satisfies the following condition: 0.05≤d9/TTL≤0.16, within a range of which it facilitates realizing ultra-thinness. Preferably, the camera optical lens 10 satisfies the following condition: 0.08≤d9/TTL≤0.13.

In this embodiment, the sixth lens L6 includes an object-side surface being concave in a paraxial region and an image-side surface being convex in the paraxial region.

A focal length of the camera optical lens 10 is defined as f, a focal length of the sixth lens L6 is defined as f6, and the camera optical lens 10 further satisfies the following condition: −23.56≤f6/f≤−1.78. With a reasonable distribution of the refractive power, the system has better imaging quality and lower sensitivity. Preferably, the camera optical lens 10 satisfies the following condition: −14.32≤f6/f≤−2.23.

A central curvature radius of an object-side surface of the sixth lens L6 is defined as R11, a central curvature radius of an image-side surface of the sixth lens L6 is defined as R12, and the camera optical lens 10 further satisfies the following condition: −22.86≤(R11+R12)/(R11−R12)≤−3.95. Within this condition, which specifies a shape of the sixth lens L6, the development of the lenses towards ultra-thinness would facilitate correcting the off-axis aberration. Preferably, the camera optical lens 10 satisfies the following condition: −14.29≤(R11+R12)/(R11−R12)≤−4.93.

An on-axis thickness of the sixth lens L6 is defined as d11, a total optical length of the camera optical lens 10 is defined as TTL, and the camera optical lens 10 further satisfies the following condition: 0.05≤d11/TTL≤0.16, within a range of which it facilitates realizing ultra-thinness. Preferably, the camera optical lens 10 satisfies the following condition: 0.08≤d11/TTL≤0.13.

In this embodiment, an image height of the camera optical lens 10 is defined as IH, a total optical length of the camera optical lens 10 is defined as TTL, and the camera optical lens 10 further satisfies the following condition: TTL/IH≤2.35, thereby facilitating realizing ultra-thinness.

In this embodiment, an image height of the camera optical lens 10 is defined as IH, a focal length of the camera optical lens 10 is defined as f, and the camera optical lens 10 further satisfies the following condition: f/IH≥2.27. Accordingly, the camera optical lens 10 has long focal length.

In this embodiment, an F number of the camera optical lens 10 is defined as Fno, and the camera optical lens 10 further satisfies the following conditions: Fno≤2.26, so that the camera optical lens 10 has a large aperture and good imaging performance.

When satisfying the above conditions, the camera optical lens 10 have good optical performance and satisfy the design requirement of large aperture, long focal length and ultra-thinness. According to the characteristics of the camera optical lens 10, the camera optical lens 10 is especially fit for WEB camera lenses and mobile phone camera lens assemblies composed by such camera elements as CCD and CMOS for high pixels.

In the following, examples will be used to describe the camera optical lens 10 of the present disclosure. The symbols recorded in each example will be described as follows. The focal length, on-axis distance, central curvature radius, on-axis thickness, inflexion point position, and arrest point position are all in units of mm.

TTL: Total optical length (an on-axis distance from the object side surface of the first lens L1 to the image surface Si of the camera optical lens along the optical axis) in mm.

FNO: ratio of an effective focal length and an entrance pupil diameter of the camera optical lens.

Preferably, inflexion points and/or arrest points can be arranged on the object-side surface and/or the image-side surface of each lens, so as to satisfy the demand for high quality imaging. The description below can be referred for specific implementations.

The design data of the camera optical lens 10 in Embodiment 1 of the present disclosure are shown in Table 1 and Table 2.

TABLE 1 R D nd vd SI ∞ d0= −0.831 R1 2.690 d1= 1.339 nd1 1.5444 v1 55.82 R2 −8.390 d2= 0.139 R3 3.098 d3= 0.411 nd2 1.6400 v2 23.54 R4 1.449 d4= 0.398 R5 83.211 d5= 0.552 nd3 1.5444 v3 55.82 R6 −32.774 d6= 0.433 R7 2.446 d7= 0.265 nd4 1.5444 v4 55.82 R8 1.997 d8= 2.651 R9 −17.937 d9= 0.913 nd5 1.6400 v5 23.54 R10 −5.112 d10=  0.267 R11 −2.446 d11=  0.990 nd6 1.5346 v6 55.69 R12 −2.915 d12=  0.429 R13 ∞ d13=  0.210 ndg 1.5168 vg 64.17 R14 ∞ d14=  0.213

In the table, meanings of various symbols will be described as follows.

S1: aperture;

R: curvature radius of a center of an optical surface;

R1: central curvature radius of the object-side surface of the first lens L1;

R2: central curvature radius of the image-side surface of the first lens L1;

R3: central curvature radius of the object-side surface of the second lens L2;

R4: central curvature radius of the image-side surface of the second lens L2;

R5: central curvature radius of the object-side surface of the third lens L3;

R6: central curvature radius of the image-side surface of the third lens L3;

R7: central curvature radius of the object-side surface of the fourth lens L4;

R8: central curvature radius of the image-side surface of the fourth lens L4;

R9: central curvature radius of the object-side surface of the fifth lens L5;

R10: central curvature radius of the image-side surface of the fifth lens L5;

R11: central curvature radius of the object-side surface of the sixth lens L6;

R12: central curvature radius of the image-side surface of the sixth lens L6;

R13: central curvature radius of an object-side surface of the optical filter GF;

R14: central curvature radius of an image-side surface of the optical filter GF;

d: on-axis thickness of a lens or on-axis distance between neighboring lenses;

d0: on-axis distance from the aperture S1 to the object-side surface of the first lens L1;

d1: on-axis thickness of the first lens L1;

d2: on-axis distance from the image-side surface of the first lens L1 to the object-side surface of the second lens L2;

d3: on-axis thickness of the second lens L2;

d4: on-axis distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;

d5: on-axis thickness of the third lens L3;

d6: on-axis distance from the image-side surface of the third lens L3 to the object-side surface of the fourth lens L4;

d7: on-axis thickness of the fourth lens L4;

d8: on-axis distance from the image-side surface of the fourth lens L4 to the object-side surface of the fifth lens L5;

d9: on-axis thickness of the fifth lens L5;

d10: on-axis distance from the image-side surface of the fifth lens L5 to the object-side surface of the sixth lens L6;

d11: on-axis thickness of the sixth lens L6;

d12: on-axis distance from the image-side surface of the sixth lens L6 to the object-side surface of the optical filter GF;

d13: on-axis thickness of the optical filter GF;

d14: on-axis distance from the image-side surface of the optical filter GF to the image surface Si;

nd: refractive index of the d line;

nd1: refractive index of the d line of the first lens L1;

nd2: refractive index of the d line of the second lens L2;

nd3: refractive index of the d line of the third lens L3;

nd4: refractive index of the d line of the fourth lens L4;

nd5: refractive index of the d line of the fifth lens L5;

nd6: refractive index of the d line of the sixth lens L6;

ndg: refractive index of the d line of the optical filter GF;

vd: abbe number;

v1: abbe number of the first lens L1;

v2: abbe number of the second lens L2;

v3: abbe number of the third lens L3;

v4: abbe number of the fourth lens L4;

v5: abbe number of the fifth lens L5;

v6 abbe number of the sixth lens L6;

vg: abbe number of the optical filter GF.

Table 2 shows aspheric surface coefficients of each lens of the camera optical lens 10 according to Embodiment 1 of the present disclosure.

TABLE 2 Conic coefficient Aspheric surface coefficients k A4 A6 A8 A10 A12 R1 −2.7065E−01  2.0091E−03 −1.0795E−03  3.3949E−04  4.6214E−06 −1.7686E−05  R2 −9.7753E+01  1.1086E−02 −8.1717E−04  −2.1114E−04   3.9116E−05 7.9931E−06 R3 −1.5590E+01  3.1015E−03 1.0335E−03 −2.2385E−04  −6.6261E−05 7.5129E−05 R4 −3.9331E+00  1.9755E−02 4.0458E−03 1.3816E−03  3.0419E−04 2.0229E−04 R5  2.0000E+02  3.1350E−02 1.9361E−02 4.3637E−04  1.4224E−04 −4.5214E−04  R6  6.9510E−03  3.9488E−02 −5.1511E−03  −1.3240E−03   1.0209E−04 1.9791E−04 R7 −1.4303E+01 −7.2840E−02 1.1287E−02 3.9443E−03 −7.5827E−04 −7.5450E−04  R8 −8.7248E+00 −4.6870E−02 8.3136E−03 2.1323E−03 −7.2561E−04 −1.6402E−04  R9  3.0767E+01 −6.1149E−03 7.6152E−04 −4.1612E−04   6.7178E−05 −6.5045E−06  R10  6.7429E−01 −3.8503E−03 5.1498E−04 −1.1889E−04  −7.2261E−07 2.8004E−06 R11 −2.4924E+00 −2.4524E−03 −1.6776E−03  8.2885E−04 −1.3281E−04 1.1655E−05 R12 −7.0143E+00 −1.0534E−02 −7.5800E−04  4.8337E−04 −7.7291E−05 6.5054E−06 Conic coefficient Aspheric surface coefficients k A14 A16 A18 A20 R1 −2.7065E−01 −1.5590E−06 6.5125E−07  2.1955E−07 −5.0321E−08 R2 −9.7753E+01  8.2773E−07 −4.8452E−07  −1.8118E−07  2.5870E−08 R3 −1.5590E+01  1.5476E−05 −3.9809E−06  −2.3723E−06  4.3763E−07 R4 −3.9331E+00  1.0426E−04 1.4834E−05 −1.8758E−05 −1.9208E−05 R5  2.0000E+02 −2.7307E−05 1.8604E−04  9.8212E−05 −7.8313E−05 R6  6.9510E−03  3.6296E−04 2.3220E−04 −1.8630E−04  0.0000E+00 R7 −1.4303E+01 −6.1227E−05 1.1066E−04  6.2804E−05 −2.8578E−05 R8 −8.7248E+00  1.5684E−05 1.4294E−05  1.1108E−06 −9.0136E−07 R9  3.0767E+01  2.1178E−08 4.5269E−08  1.9673E−10 −1.3383E−10 R10  6.7429E−01 −4.9798E−07 4.2726E−08 −2.1627E−09  9.2830E−11 R11 −2.4924E+00 −6.2031E−07 2.0499E−08 −3.7945E−10  2.5135E−12 R12 −7.0143E+00 −3.3191E−07 1.0270E−08 −1.3941E−10  8.2871E−13

In Table 2, k is a conic coefficient, and A4, A6, A8, A10, A12, A14, A16, A18 and A20 are aspheric surface coefficients.

y=(^(x2) /R)/[1+{1−(k+1)(^(x2)/^(R2))^(}1/2)]+A4^(x4) +A6^(x6) +A8^(x8) +A10^(x10) +A12^(x12) +A14^(x14) +A16^(x16) +A18^(x18) +A20^(x20)  (1)

Herein, x donates a vertical distance between a point in the aspheric curve and the optical axis, and y donates an aspheric depth (i.e. a vertical distance between the point having a distance of x from the optical axis and a plane tangent to the vertex on the optical axis of the aspheric surface).

For convenience, an aspheric surface of each lens surface uses the aspheric surfaces shown in the above formula (1). However, the present disclosure is not limited to the aspherical polynomials form shown in the formula (1).

Table 3 and Table 4 show design data of inflexion points and arrest points of each lens of the camera optical lens 10 according to Embodiment 1. P1R1 and P1R2 represent the object-side surface and the image-side surface of the first lens L1, P2R1 and P2R2 represent the object-side surface and the image-side surface of the second lens L2, P3R1 and P3R2 represent the object-side surface and the image-side surface of the third lens L3, P4R1 and P4R2 represent the object-side surface and the image-side surface of the fourth lens L4, P5R1 and P5R2 represent the object-side surface and the image-side surface of the fifth lens L5, P6R1 and P6R2 represent the object-side surface and the image-side surface of the sixth lens L6. The data in the column named “inflexion point position” refer to vertical distances from inflexion points arranged on each lens surface to the optic axis of the camera optical lens 10. The data in the column named “arrest point position” refer to vertical distances from arrest points arranged on each lens surface to the optical axis of the camera optical lens 10.

TABLE 3 Number(s) of Inflexion point Inflexion point inflexion points position 1 position 2 P1R1 1 2.015 / P1R2 2 0.695 1.795 P2R1 0 / / P2R2 1 1.405 / P3R1 1 1.405 / P3R2 0 / / P4R1 1 0.515 / P4R2 1 0.675 / P5R1 1 2.645 / P5R2 1 2.845 / P6R1 1 1.965 / P6R2 1 3.125 /

TABLE 4 Number(s) of Arrest point arrest points position 1 P1R1 0 / P1R2 1 1.385 P2R1 0 / P2R2 0 / P3R1 0 / P3R2 0 / P4R1 1 1.055 P4R2 1 1.575 P5R1 0 / P5R2 0 / P6R1 1 3.235 P6R2 0

FIG. 2 and FIG. 3 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm after passing the camera optical lens 10, respectively. FIG. 4 illustrates a field curvature and a distortion with a wavelength of 555 nm after passing the camera optical lens 10. A field curvature S in FIG. 4 is a field curvature in a sagittal direction, and T is a field curvature in a tangential direction.

In the subsequent Table 13, various parameters of Embodiments 1, 2 and 3 and values corresponding to the parameters specified in the above conditions are shown.

As shown in Table 13, Embodiment 1 satisfies the various conditions.

In this Embodiment, an entrance pupil diameter (ENPD) of the camera optical lens 10 is 4.070 mm, an image height of (IH) is 4.000 mm, and a field of view (FOV) in a diagonal direction is 44.00°. Thus, the camera optical lens 10 achieves large aperture, long focal length and ultra-thinness, the on-axis and off-axis aberration is sufficiently corrected, thereby achieving excellent optical performance.

Embodiment 2

Embodiment 2 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1, and only differences therebetween will be described in the following.

A structure of a camera optical lens 20 according to Embodiment 2 of the present disclosure is shown in FIG. 5.

Table 5 and Table 6 show design data of the camera optical lens 20 in Embodiment 2 of the present disclosure.

TABLE 5 R D nd vd SI ∞ d0= −0.831 R1 2.690 d1= 1.350 nd1 1.5444 v1 55.82 R2 −8.480 d2= 0.154 R3 3.028 d3= 0.416 nd2 1.6400 v2 23.54 R4 1.441 d4= 0.379 R5 28.470 d5= 0.553 nd3 1.5444 v3 55.82 R6 −35.892 d6= 0.496 R7 15.824 d7= 0.594 nd4 1.5444 v4 55.82 R8 5.289 d8= 2.196 R9 −48.088 d9= 0.976 nd5 1.6400 v5 23.54 R10 −5.618 d10=  0.343 R11 −2.523 d11=  0.984 nd6 1.5346 v6 55.69 R12 −3.549 d12=  0.587 R13 ∞ d13=  0.210 ndg 1.5168 vg 64.17 R14 ∞ d14=  0.040

Table 6 shows aspheric surface coefficients of each lens of the camera optical lens 20 according to Embodiment 2 of the present disclosure.

TABLE 6 Conic coefficient Aspheric surface coefficients k A4 A6 A8 A10 A12 R1 −2.6176E−01  2.2702E−03 −1.0705E−03  3.4058E−04  4.7971E−06 −1.7665E−05  R2 −8.7717E+01  1.1057E−02 −8.1259E−04  −2.1079E−04   3.8929E−05 7.9281E−06 R3 −1.5852E+01  3.0674E−03 1.0387E−03 −2.1465E−04  −6.2142E−05 7.6416E−05 R4 −3.9511E+00  2.0049E−02 4.2534E−03 1.4272E−03  3.0345E−04 1.9725E−04 R5 −5.0000E+02  2.9910E−02 1.9489E−02 5.0083E−04  1.6808E−04 −4.4212E−04  R6  6.9825E−03  3.5845E−02 −6.0468E−03  −1.3187E−03   2.4433E−04 3.0424E−04 R7 −2.4107E+01 −7.4407E−02 1.1733E−02 4.0812E−03 −1.1876E−03 −1.1579E−03  R8 −7.4396E+00 −4.4322E−02 8.7617E−03 1.5773E−03 −7.6411E−04 −1.0745E−04  R9  1.5345E+02 −6.7224E−03 6.9494E−04 −4.1937E−04   6.7093E−05 −6.5114E−06  R10  6.8422E−01 −3.3925E−03 4.8808E−04 −1.2133E−04  −8.5782E−07 2.7955E−06 R11 −2.2938E+00 −2.5097E−03 −1.6727E−03  8.2924E−04 −1.3279E−04 1.1653E−05 R12 −6.2802E+00 −1.0690E−02 −7.5853E−04  4.8396E−04 −7.7234E−05 6.5087E−06 Conic coefficient Aspheric surface coefficients k A14 A16 A18 A20 R1 −2.6176E−01 −1.5596E−06 6.4987E−07  2.1901E−07 −5.0497E−08 R2 −8.7717E+01  8.1483E−07 −4.8580E−07  −1.8090E−07  2.6107E−08 R3 −1.5852E+01  1.5803E−05 −3.9146E−06  −2.3650E−06  4.3542E−07 R4 −3.9511E+00  1.0145E−04 1.3771E−05 −1.8967E−05 −1.9168E−05 R5 −5.0000E+02 −2.4519E−05 1.8633E−04  9.7852E−05 −7.8710E−05 R6  6.9825E−03  4.1289E−04 2.4239E−04 −1.9728E−04  0.0000E+00 R7 −2.4107E+01 −1.3539E−04 2.2350E−04  1.4360E−04 −5.7804E−05 R8 −7.4396E+00  3.1261E−05 1.5322E−05  4.4501E−07 −1.1126E−06 R9  1.5345E+02  1.9648E−08 4.5073E−08  1.8582E−10 −1.3276E−10 R10  6.8422E−01 −4.9808E−07 4.2685E−08 −2.1787E−09  8.9370E−11 R11 −2.2938E+00 −6.2068E−07 2.0461E−08 −3.8159E−10  2.6768E−12 R12 −6.2802E+00 −3.3187E−07 1.0250E−08 −1.4288E−10  3.9097E−13

Table 7 and table 8 show design data of inflexion points and arrest points of each lens of the camera optical lens 20 according to Embodiment 2 of the present disclosure.

TABLE 7 Number(s) of Inflexion point Inflexion point inflexion points position 1 position 2 P1R1 1 2.015 / P1R2 2 0.705 1.795 P2R1 0 / / P2R2 1 1.395 / P3R1 1 1.405 / P3R2 0 / / P4R1 2 0.275 1.375 P4R2 1 0.635 / P5R1 1 2.645 / P5R2 1 2.885 / P6R1 1 1.985 / P6R2 1 3.215 /

TABLE 8 Number(s) of Arrest point arrest points position 1 P1R1 0 / P1R2 1 1.415 P2R1 0 / P2R2 0 / P3R1 0 / P3R2 0 / P4R1 1 0.475 P4R2 1 1.405 P5R1 0 / P5R2 0 / P6R1 1 3.305 P6R2 0 /

FIG. 6 and FIG. 7 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm after passing the camera optical lens 20, respectively. FIG. 8 illustrates a field curvature and a distortion of light with a wavelength of 555 nm after passing the camera optical lens 20. A field curvature S in FIG. 8 is a field curvature in a sagittal direction, and T is a field curvature in a tangential direction.

As shown in table 13, Embodiment 2 satisfies each condition.

In this embodiment, an entrance pupil diameter (ENPD) of the camera optical lens 20 is 4.063 mm, an image height of (IH) is 4.000 mm, and a field of view (FOV) in the diagonal direction is 44.00°. Thus, the camera optical lens 20 achieves large aperture, long focal length and ultra-thinness, the on-axis and off-axis aberration is sufficiently corrected, thereby achieving excellent optical performance.

Embodiment 3

Embodiment 3 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1, and only differences therebetween will be described in the following.

A structure of a camera optical lens 30 according to Embodiment 3 of the present disclosure is shown in FIG. 9.

Table 9 and Table 10 show design data of a camera optical lens 30 in Embodiment 3 of the present disclosure.

TABLE 9 R D nd vd SI ∞ d0= −0.808 R1 2.703 d1= 1.324 nd1 1.5444 v1 55.82 R2 −8.622 d2= 0.140 R3 3.185 d3= 0.410 nd2 1.6400 v2 23.54 R4 1.463 d4= 0.397 R5 394.413 d5= 0.541 nd3 1.5444 v3 55.82 R6 −48.651 d6= 0.418 R7 2.195 d7= 0.253 nd4 1.5444 v4 55.82 R8 1.920 d8= 2.257 R9 −19.111 d9= 0.901 nd5 1.6400 v5 23.54 R10 −5.344 d10=  0.750 R11 −2.310 d11=  1.009 nd6 1.5346 v6 55.69 R12 −2.846 d12=  0.080 R13 ∞ d13=  0.210 ndg 1.5168 vg 64.17 R14 ∞ d14=  0.531

Table 10 shows aspheric surface coefficients of each lens of the camera optical lens 30 according to Embodiment 3 of the present disclosure.

TABLE 10 Conic coefficient Aspheric surface coefficients k A4 A6 A8 A10 A12 R1 −2.7063E−01  1.9260E−03 −1.0727E−03  3.4118E−04  4.9258E−06 −1.7632E−05  R2 −9.8332E+01  1.1052E−02 −8.2200E−04  −2.1154E−04   3.9111E−05 8.0021E−06 R3 −1.6077E+01  3.0378E−03 1.0198E−03 −2.2841E−04  −6.7653E−05 7.4758E−05 R4 −3.9348E+00  1.9815E−02 4.0841E−03 1.4004E−03  3.1284E−04 2.0594E−04 R5  9.9731E+02  3.1657E−02 1.9263E−02 4.0499E−04  1.3026E−04 −4.5738E−04  R6  5.5146E−03  4.0861E−02 −4.9394E−03  −1.3727E−03   2.5182E−05 1.5207E−04 R7 −1.3420E+01 −7.2050E−02 1.1026E−02 4.0443E−03 −7.5068E−04 −7.4738E−04  R8 −9.3854E+00 −5.1251E−02 7.3779E−03 2.0367E−03 −6.8955E−04 −1.4225E−04  R9  3.4056E+01 −6.1308E−03 7.1732E−04 −4.1810E−04   6.7578E−05 −6.4425E−06  R10  6.3007E−01 −3.5277E−03 4.8045E−04 −1.1480E−04  −2.2094E−07 2.8322E−06 R11 −2.3646E+00 −2.5286E−03 −1.6792E−03  8.2882E−04 −1.3279E−04 1.1658E−05 R12 −5.9681E+00 −1.0750E−02 −7.6237E−04  4.8373E−04 −7.7237E−05 6.5099E−06 Conic coefficient Aspheric surface coefficients k A14 A16 A18 A20 R1 −2.7063E−01 −1.5494E−06 6.5298E−07  2.1992E−07 −5.0242E−08 R2 −9.8332E+01  8.3160E−07 −4.8342E−07  −1.8089E−07  2.5937E−08 R3 −1.6077E+01  1.5384E−05 −4.0012E−06  −2.3763E−06  4.3713E−07 R4 −3.9348E+00  1.0560E−04 1.5352E−05 −1.8605E−05 −1.9165E−05 R5  9.9731E+02 −2.9804E−05 1.8478E−04  9.7558E−05 −7.8667E−05 R6  5.5146E−03  3.4342E−04 2.2936E−04 −1.8002E−04  0.0000E+00 R7 −1.3420E+01 −4.6395E−05 1.1958E−04  6.5519E−05 −2.9112E−05 R8 −9.3854E+00  2.1736E−05 1.5110E−05  8.0604E−07 −1.2308E−06 R9  3.4056E+01  2.7918E−08 4.5924E−08  2.5932E−10 −1.2765E−10 R10  6.3007E−01 −4.9649E−07 4.2741E−08 −2.1687E−09  9.1569E−11 R11 −2.3646E+00 −6.1998E−07 2.0522E−08 −3.7939E−10  2.1953E−12 R12 −5.9681E+00 −3.3165E−07 1.0277E−08 −1.4010E−10  6.4843E−13

Table 11 and table 12 show design data of inflexion points and arrest points of each lens of the camera optical lens 30 according to Embodiment 3 of the present disclosure.

TABLE 11 Number(s) of Inflexion point Inflexion point inflexion points position 1 position 2 P1R1 1 2.025 / P1R2 2 0.695 1.795 P2R1 0 / / P2R2 1 1.405 / P3R1 1 1.405 / P3R2 1 1.375 / P4R1 1 0.525 / P4R2 1 0.625 / P5R1 1 2.585 / P5R2 1 2.785 / P6R1 1 1.975 / P6R2 1 3.105 /

TABLE 12 Number(s) of Arrest point arrest points position 1 P1R1 0 / P1R2 1 1.385 P2R1 0 / P2R2 0 / P3R1 0 / P3R2 0 / P4R1 1 1.095 P4R2 1 1.395 P5R1 0 / P5R2 0 / P6R1 1 3.255 P6R2 0 /

FIG. 10 and FIG. 11 illustrate a longitudinal aberration and a lateral color of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm and 435 nm after passing the camera optical lens 30, respectively. FIG. 12 illustrates a field curvature and a distortion of light with a wavelength of 555 nm after passing the camera optical lens 30. A field curvature S in FIG. 12 is a field curvature in a sagittal direction, and T is a field curvature in a tangential direction.

Table 13 in the following shows values corresponding to the conditions according to the aforementioned conditions in the embodiments. Apparently, the camera optical system in the present embodiment satisfies the aforementioned conditions.

In this embodiment, an entrance pupil diameter (ENPD) of the camera optical lens 30 is 4.044 mm, an image height of (IH) is 4.000 mm, and a field of view (FOV) in the diagonal direction is 45.40°. Thus, the camera optical lens 30 achieves large aperture, long focal length and ultra-thinness, the on-axis and off-axis aberration is sufficiently corrected, thereby achieving excellent optical performance.

TABLE 13 Parameters and Embodiment Embodiment Embodiment conditions 1 2 3 f6/f5 −10.00 −2.50 −5.95 d8/d10 9.93 6.40 3.01 f 9.159 9.143 9.100 f1 3.896 3.906 3.930 f2 −4.676 −4.749 −4.628 f3 43.122 29.157 79.330 f4 −25.172 −14.840 −41.710 f5 10.789 9.777 11.217 f6 −107.881 −24.451 −66.744 f12 8.571 8.326 8.974 FNO 2.25 2.25 2.25 TTL 9.210 9.278 9.221 IH 4.000 4.000 4.000 FOV 44.00° 44.00° 45.40°

It will be understood by those of ordinary skill in the art that the embodiments described above are specific embodiments realizing the present disclosure, and that in practical applications, various changes may be made thereto in form and in detail without departing from the range and scope of the disclosure. 

What is claimed is:
 1. A camera optical lens, with six lenses, comprising from an object side to an image side: a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a positive power; a fourth lens having a negative refractive power, a fifth lens having a positive power; and a sixth lens having a negative refractive power; wherein the camera optical lens satisfies following conditions: −10.00≤f6/f5≤−2.50; and 3.00≤d8/d10≤10.00; where f5 denotes a focal length of the fifth lens; f6 denotes a focal length of the sixth lens; d8 denotes an on-axis distance from the image-side surface of the fourth lens to the object-side surface of the fifth lens; and d10 denotes an on-axis distance from the image-side surface of the fifth lens to the object-side surface of the sixth lens.
 2. The camera optical lens according to claim 1 further satisfying the following condition: 2.00≤(R7+R8)/(R7−R8)≤15.00; where R7 denotes a central curvature radius of an object-side surface of the fourth lens; and R8 denotes a central curvature radius of an image-side surface of the fourth lens.
 3. The camera optical lens according to claim 1 further satisfying the following condition: 5.00≤f4/f≤−1.50; where f denotes a focal length of the camera optical lens; and f4 denotes a focal length of the fourth lens.
 4. The camera optical lens according to claim 1 further satisfying the following conditions: 0.21≤f1/f≤0.65; −1.05≤(R1+R2)/(R1−R2)≤−0.34; and 0.07≤d1/TTL≤0.22; where f denotes a focal length of the camera optical lens; f1 denotes a focal length of the first lens; R1 denotes a central curvature radius of an object-side surface of the first lens; R2 denotes a central curvature radius of an image-side surface of the first lens; and TTL denotes a total optical length of the camera optical lens.
 5. The camera optical lens according to claim 1 further satisfying the following conditions: −1.04≤f2/f≤−0.34; 1.35≤(R3+R4)/(R3−R4)≤4.22; and 0.02≤d3/TTL≤0.07; where f denotes a focal length of the camera optical lens; f2 denotes a focal length of the second lens; R3 denotes a central curvature radius of an object-side surface of the second lens; R4 denotes a central curvature radius of an image-side surface of the second lens; d3 denotes an on-axis thickness of the second lens; and TTL denotes a total optical length of the camera optical lens.
 6. The camera optical lens according to claim 1 further satisfying the following conditions: 1.59≤f3/f≤13.08; −0.23≤(R5+R6)/(R5−R6)≤1.17; and 0.03≤d5/TTL≤0.09; where f denotes a focal length of the camera optical lens; f3 denotes a focal length of the third lens; R5 denotes a central curvature radius of an object-side surface of the third lens; R6 denotes a central curvature radius of an image-side surface of the third lens; d5 denotes an on-axis thickness of the third lens; and TTL denotes a total optical length of the camera optical lens.
 7. The camera optical lens according to claim 1 further satisfying the following conditions: 0.01≤d7/TTL≤0.10; where d7 denotes an on-axis thickness of the fourth lens; and TTL denotes a total optical length of the camera optical lens.
 8. The camera optical lens according to claim 1 further satisfying the following conditions: 0.53≤f5/f≤1.85; 0.63≤(R9+R10)/(R9−R10)≤2.70; and 0.05≤d9/TTL≤0.16; where f denotes a focal length of the camera optical lens; R9 denotes a central curvature radius of an object-side surface of the fifth lens; R10 denotes a central curvature radius of an image-side surface of the fifth lens; d9 denotes an on-axis thickness of the fifth lens; and TTL denotes a total optical length of the camera optical lens.
 9. The camera optical lens according to claim 1 further satisfying the following conditions: −23.56≤f6/f≤−1.78; −22.86≤(R11+R12)/(R11−R12)≤−3.95; and 0.05≤d11/TTL≤0.16; where f denotes a focal length of the camera optical lens; R11 denotes a central curvature radius of an object-side surface of the sixth lens; R12 denotes a central curvature radius of an image-side surface of the sixth lens; d11 denotes an on-axis thickness of the sixth lens; and TTL denotes a total optical length of the camera optical lens.
 10. The camera optical lens according to claim 1 further satisfying the following condition: TTL/IH≤2.35; where TTL denotes a total optical length of the camera optical lens; and IH denotes an image height of the camera optical lens. 